page 90 Maintenance
13 Maintenance
13.1 Checking the shape of the probes
!
The accuracy of measurements depends on the proper shape of the measuring
probes. By careless handling the probes can easily be damaged and made
useless.
13.1.1 The ring
The ring must always be handled very carefully as it is easily deformed. If the ring is
not absolutely plane and round then there will be large measuring errors. The proper
shape of the ring can be assessed as follows:
Hold the ring by the shaft and rotate it by turning the shaft between your thumb and
forefinger. The ring should rotate without any recognizable variation in height and
side-to-side movement. The light reflexes from the surfaces can help you in your
assessment.
A further test is the assessment of the mirror image of the ring on the liquid surface.
The ring and its mirror image must be absolutely parallel.
*
KRÜSS offers a ring-adjusting service if the ring is deformed. If you wish to return
the ring to its proper shape yourself then you need to order Ring-adjusting tool
TO01 from us.
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